Main commodities | Ag; Cu; Pb; Zn |
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Ore minerals | argentiferous galena; chalcopyrite; sphalerite |
Gangue minerals | carbonates; quartz |
Quadrangle map, 1:250,000-scale | CA |
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Quadrangle map, 1:63,360-scale | B-5 |
Latitude | 65.46 |
Longitude | -161.31 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | The occurrence is at an elevation of about 1,000 feet on upper Kiwalik River. The site is in section 26, T. 1 N., R. 13 W., of the Kateel River Meridian. Cobb, 1972 (MF 389), location 12, and Miller and Elliott (1969), sample location 35, figure 2. |
Geologic descriptionThis occurrence is located adjacent to the mid-Cretaceous Quartz Creek pluton, a hook-shaped, quartz monzonite body. The pluton is surrounded by a N 15 W-trending alteration zone about 18 miles long and 2 to 5 miles wide. The alteration zone is in Jurassic-Cretaceous andesitic volcanic rocks, and is marked by carbonate-quartz replacement, and tourmaline. Fine-grained dikes of varying composition cut the andesites near the pluton. Dikes near the Quartz Creek pluton are locally mineralized. At this occurrence disseminated galena occurs in oxidized carbonate-quartz rock. Analytical results from a composite grab sample were: 3 ppm Ag, 500 ppm Cu, greater than 2% Pb, and greater than 1% Zn (Miller and Elliott, 1969, number 35). | |
Geologic map unit | (-161.312640784088, 65.4593266584117) |
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Mineral deposit model | Sulfides in altered andesite. |
Age of mineralization | Mid-Cretaceous or younger. |
Alteration of deposit | Oxidation, carbonate replacement, and tourmaline. |
Workings or exploration | The area has been mapped by the U.S. Geological Survey and examined by various exploration companies. |
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Indication of production | None |
Additional commentsThis site is one of numerous occurrences of argentiferous galena, sphalerite, pyrite, and arsenopyrite in an 18-mile-long, 2- to 5-mile-wide zone of altered andesite surrounding the Quartz Creek quartz monzonite pluton. The altered zone trends N 15 W, across the drainage basins of Quartz Creek and the Kiwalik River. |
MRDS Number | A013488 |
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References | |
Reporters | Anita Williams (Anchorage, AK) |
Last report date | 1/12/2000 |